40 (qirq) — 39 va 41 sonlari orasidagi natural son.
| 40 | |
|---|---|
| 37 · 38 · 39 · 40 · 41 · 42 · 43 | |
| Sonlar roʻyxati — Butun sonlar | |
| Oʻqilishi | qirq |
| Tartibi |
40chi (qirqinchi) |
| Faktorizatsiya | 2×2×2×5 |
| Rimcha koʻrinishi | XL |
| Ikkilik yozuvida | 101000 |
| Sakkizlik yozuvida | 50 |
| Oʻn oltilik yozuvida | 28 |
40 = 23 × 5
- The Penguin Dictionary of Curious and Interesting Numbers (inglizcha) Walles, David: . London: Penguin Books, 1987.
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